/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:20:50,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:20:50,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:20:50,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:20:50,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:20:50,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:20:50,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:20:50,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:20:50,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:20:50,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:20:50,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:20:50,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:20:50,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:20:50,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:20:50,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:20:50,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:20:50,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:20:50,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:20:50,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:20:50,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:20:50,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:20:50,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:20:50,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:20:50,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:20:50,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 17:20:50,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:20:50,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:20:50,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:20:50,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:20:50,697 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:20:50,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:20:50,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:20:50,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:20:50,700 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:20:50,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:20:50,700 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:20:50,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:20:50,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:20:50,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:20:50,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:20:50,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:20:50,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:20:50,703 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:20:50,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:20:50,703 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:20:50,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:20:50,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:20:50,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:20:50,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:20:50,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:20:50,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:50,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:20:50,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:20:50,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:20:50,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:20:50,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:20:50,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:20:50,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:20:50,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:20:51,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:20:51,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:20:51,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:20:51,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:20:51,028 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:20:51,029 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-21 17:20:51,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ace321111/2a43e101f44c433ba5cfd503d16b3e45/FLAG376195fe9 [2020-08-21 17:20:51,529 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:20:51,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-21 17:20:51,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ace321111/2a43e101f44c433ba5cfd503d16b3e45/FLAG376195fe9 [2020-08-21 17:20:51,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ace321111/2a43e101f44c433ba5cfd503d16b3e45 [2020-08-21 17:20:51,932 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:20:51,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:20:51,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:51,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:20:51,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:20:51,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:51" (1/1) ... [2020-08-21 17:20:51,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2894617f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:51, skipping insertion in model container [2020-08-21 17:20:51,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:51" (1/1) ... [2020-08-21 17:20:51,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:20:51,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:20:52,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:52,147 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:20:52,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:52,182 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:20:52,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52 WrapperNode [2020-08-21 17:20:52,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:52,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:20:52,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:20:52,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:20:52,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52" (1/1) ... [2020-08-21 17:20:52,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52" (1/1) ... [2020-08-21 17:20:52,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52" (1/1) ... [2020-08-21 17:20:52,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52" (1/1) ... [2020-08-21 17:20:52,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52" (1/1) ... [2020-08-21 17:20:52,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52" (1/1) ... [2020-08-21 17:20:52,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52" (1/1) ... [2020-08-21 17:20:52,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:20:52,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:20:52,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:20:52,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:20:52,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:52,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:20:52,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:20:52,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:20:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:20:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:20:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:20:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:20:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:20:52,605 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:20:52,605 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 17:20:52,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:52 BoogieIcfgContainer [2020-08-21 17:20:52,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:20:52,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:20:52,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:20:52,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:20:52,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:20:51" (1/3) ... [2020-08-21 17:20:52,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7962aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:52, skipping insertion in model container [2020-08-21 17:20:52,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:52" (2/3) ... [2020-08-21 17:20:52,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7962aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:52, skipping insertion in model container [2020-08-21 17:20:52,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:52" (3/3) ... [2020-08-21 17:20:52,620 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-21 17:20:52,635 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:20:52,644 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:20:52,659 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:20:52,688 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:20:52,688 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:20:52,688 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:20:52,689 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:20:52,689 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:20:52,689 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:20:52,689 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:20:52,689 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:20:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-21 17:20:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 17:20:52,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:52,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:52,719 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-21 17:20:52,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:52,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566316218] [2020-08-21 17:20:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:52,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566316218] [2020-08-21 17:20:52,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:52,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:52,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090890663] [2020-08-21 17:20:52,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:52,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:52,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:52,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:52,920 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-21 17:20:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:52,972 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-21 17:20:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:52,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-21 17:20:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:52,986 INFO L225 Difference]: With dead ends: 57 [2020-08-21 17:20:52,986 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 17:20:52,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 17:20:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-21 17:20:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 17:20:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-21 17:20:53,028 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-21 17:20:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,029 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-21 17:20:53,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-21 17:20:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 17:20:53,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:20:53,031 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,032 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-21 17:20:53,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711211141] [2020-08-21 17:20:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711211141] [2020-08-21 17:20:53,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321466414] [2020-08-21 17:20:53,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,095 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-21 17:20:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,140 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-21 17:20:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-21 17:20:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,143 INFO L225 Difference]: With dead ends: 67 [2020-08-21 17:20:53,143 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 17:20:53,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 17:20:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-21 17:20:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 17:20:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-21 17:20:53,154 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-21 17:20:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,154 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-21 17:20:53,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-21 17:20:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 17:20:53,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:20:53,157 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-21 17:20:53,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269650419] [2020-08-21 17:20:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269650419] [2020-08-21 17:20:53,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470673800] [2020-08-21 17:20:53,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,206 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-21 17:20:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,230 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-21 17:20:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 17:20:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,234 INFO L225 Difference]: With dead ends: 63 [2020-08-21 17:20:53,235 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 17:20:53,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 17:20:53,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-21 17:20:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 17:20:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-21 17:20:53,251 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-21 17:20:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,251 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-21 17:20:53,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-21 17:20:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 17:20:53,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:20:53,256 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-21 17:20:53,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234015848] [2020-08-21 17:20:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234015848] [2020-08-21 17:20:53,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034204459] [2020-08-21 17:20:53,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,302 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-21 17:20:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,322 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-21 17:20:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 17:20:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,324 INFO L225 Difference]: With dead ends: 76 [2020-08-21 17:20:53,325 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 17:20:53,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 17:20:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-21 17:20:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 17:20:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-21 17:20:53,336 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-21 17:20:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,336 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-21 17:20:53,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-21 17:20:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 17:20:53,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:20:53,338 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-21 17:20:53,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236142821] [2020-08-21 17:20:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236142821] [2020-08-21 17:20:53,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581952166] [2020-08-21 17:20:53,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,385 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-21 17:20:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,431 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-21 17:20:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 17:20:53,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,437 INFO L225 Difference]: With dead ends: 124 [2020-08-21 17:20:53,437 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 17:20:53,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 17:20:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-21 17:20:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-21 17:20:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-21 17:20:53,449 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-21 17:20:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,449 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-21 17:20:53,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-21 17:20:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 17:20:53,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:20:53,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-21 17:20:53,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586755961] [2020-08-21 17:20:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586755961] [2020-08-21 17:20:53,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508097951] [2020-08-21 17:20:53,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,489 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-21 17:20:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,512 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-21 17:20:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 17:20:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,514 INFO L225 Difference]: With dead ends: 111 [2020-08-21 17:20:53,514 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 17:20:53,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 17:20:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-21 17:20:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 17:20:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-21 17:20:53,525 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-21 17:20:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,526 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-21 17:20:53,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,526 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-21 17:20:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 17:20:53,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:20:53,528 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-21 17:20:53,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120175460] [2020-08-21 17:20:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120175460] [2020-08-21 17:20:53,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362634278] [2020-08-21 17:20:53,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,564 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-21 17:20:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,584 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-21 17:20:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 17:20:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,586 INFO L225 Difference]: With dead ends: 132 [2020-08-21 17:20:53,587 INFO L226 Difference]: Without dead ends: 130 [2020-08-21 17:20:53,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-21 17:20:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-21 17:20:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 17:20:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-21 17:20:53,601 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-21 17:20:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,601 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-21 17:20:53,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-21 17:20:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 17:20:53,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:20:53,604 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-21 17:20:53,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921498899] [2020-08-21 17:20:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921498899] [2020-08-21 17:20:53,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35439257] [2020-08-21 17:20:53,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,644 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-21 17:20:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,670 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-21 17:20:53,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 17:20:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,672 INFO L225 Difference]: With dead ends: 232 [2020-08-21 17:20:53,673 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 17:20:53,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 17:20:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 17:20:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 17:20:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-21 17:20:53,690 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-21 17:20:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,703 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-21 17:20:53,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,704 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-21 17:20:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:20:53,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:20:53,706 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-21 17:20:53,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728159551] [2020-08-21 17:20:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728159551] [2020-08-21 17:20:53,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228540133] [2020-08-21 17:20:53,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,738 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-21 17:20:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,761 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-21 17:20:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 17:20:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,763 INFO L225 Difference]: With dead ends: 204 [2020-08-21 17:20:53,763 INFO L226 Difference]: Without dead ends: 142 [2020-08-21 17:20:53,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-21 17:20:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-21 17:20:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 17:20:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-21 17:20:53,777 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-21 17:20:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,777 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-21 17:20:53,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-21 17:20:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:20:53,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:20:53,780 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-21 17:20:53,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456512046] [2020-08-21 17:20:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456512046] [2020-08-21 17:20:53,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473610599] [2020-08-21 17:20:53,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,818 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-21 17:20:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,855 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-21 17:20:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 17:20:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,858 INFO L225 Difference]: With dead ends: 236 [2020-08-21 17:20:53,858 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 17:20:53,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 17:20:53,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-21 17:20:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-21 17:20:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-21 17:20:53,872 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-21 17:20:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,873 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-21 17:20:53,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-21 17:20:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:20:53,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:20:53,875 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,875 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-21 17:20:53,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328171489] [2020-08-21 17:20:53,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:53,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328171489] [2020-08-21 17:20:53,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299328130] [2020-08-21 17:20:53,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,908 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-21 17:20:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,931 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-21 17:20:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 17:20:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,933 INFO L225 Difference]: With dead ends: 444 [2020-08-21 17:20:53,934 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 17:20:53,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 17:20:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 17:20:53,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 17:20:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-21 17:20:53,954 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-21 17:20:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,955 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-21 17:20:53,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-21 17:20:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 17:20:53,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:20:53,957 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,958 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-21 17:20:53,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439485437] [2020-08-21 17:20:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:54,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439485437] [2020-08-21 17:20:54,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:54,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:54,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448025658] [2020-08-21 17:20:54,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:54,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:54,007 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-21 17:20:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:54,043 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-21 17:20:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:54,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 17:20:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:54,046 INFO L225 Difference]: With dead ends: 384 [2020-08-21 17:20:54,047 INFO L226 Difference]: Without dead ends: 266 [2020-08-21 17:20:54,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:54,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-21 17:20:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-21 17:20:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-21 17:20:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-21 17:20:54,070 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-21 17:20:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:54,070 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-21 17:20:54,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-21 17:20:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 17:20:54,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:54,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:54,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:20:54,083 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-21 17:20:54,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:54,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62403934] [2020-08-21 17:20:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:54,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62403934] [2020-08-21 17:20:54,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:54,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:54,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715454660] [2020-08-21 17:20:54,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:54,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:54,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:54,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:54,117 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-21 17:20:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:54,138 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-21 17:20:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:54,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 17:20:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:54,142 INFO L225 Difference]: With dead ends: 426 [2020-08-21 17:20:54,142 INFO L226 Difference]: Without dead ends: 424 [2020-08-21 17:20:54,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-21 17:20:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-21 17:20:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-21 17:20:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-21 17:20:54,157 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-21 17:20:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:54,157 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-21 17:20:54,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-21 17:20:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 17:20:54,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:54,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:54,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:20:54,160 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:54,160 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-21 17:20:54,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:54,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19386781] [2020-08-21 17:20:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:54,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19386781] [2020-08-21 17:20:54,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:54,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:54,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823493833] [2020-08-21 17:20:54,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:54,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:54,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:54,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:54,185 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-21 17:20:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:54,211 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-21 17:20:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:54,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 17:20:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:54,213 INFO L225 Difference]: With dead ends: 856 [2020-08-21 17:20:54,213 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:20:54,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:20:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:20:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:20:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:20:54,216 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-21 17:20:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:54,216 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:20:54,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:20:54,217 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:20:54,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:20:54,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:20:54,242 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 17:20:54,242 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:20:54,242 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:20:54,242 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:20:54,242 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:20:54,243 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:20:54,243 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-21 17:20:54,243 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-21 17:20:54,243 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-21 17:20:54,243 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 17:20:54,243 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-21 17:20:54,243 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 17:20:54,244 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 17:20:54,244 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 17:20:54,244 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 17:20:54,244 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 17:20:54,244 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-21 17:20:54,244 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 17:20:54,244 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-21 17:20:54,244 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-21 17:20:54,245 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-21 17:20:54,245 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-21 17:20:54,245 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-21 17:20:54,245 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 17:20:54,246 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-21 17:20:54,246 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-21 17:20:54,246 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-21 17:20:54,246 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-21 17:20:54,246 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 17:20:54,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:20:54 BoogieIcfgContainer [2020-08-21 17:20:54,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:20:54,265 INFO L168 Benchmark]: Toolchain (without parser) took 2329.93 ms. Allocated memory was 140.5 MB in the beginning and 234.4 MB in the end (delta: 93.8 MB). Free memory was 103.2 MB in the beginning and 139.0 MB in the end (delta: -35.7 MB). Peak memory consumption was 58.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:54,267 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 17:20:54,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.64 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:54,274 INFO L168 Benchmark]: Boogie Preprocessor took 113.73 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 181.8 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:54,282 INFO L168 Benchmark]: RCFGBuilder took 313.57 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 166.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:54,282 INFO L168 Benchmark]: TraceAbstraction took 1648.20 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 165.6 MB in the beginning and 139.0 MB in the end (delta: 26.7 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:54,287 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.64 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.73 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 181.8 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.57 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 166.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1648.20 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 165.6 MB in the beginning and 139.0 MB in the end (delta: 26.7 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...